A DAYCO brand Tensioner Pulley, timing belt is a part of the timing belt drive, which serves to bypass the belt in a certain place or several places and is a freely rotating pulley of small diameter.

The composition of the roller is small: it is the roller mount, the internal rolling bearing with a protective oil seal, and the working body of the roller itself, which is in contact with the belt.

1. BRAVA (182_)
2. BRAVO I (182_)
3. DELTA II (836_)
4. DELTA Mk II (836_)
5. MAREA (185_)
6. MAREA Weekend (185_)
7. PALIO (178_)
8. PALIO Weekend (178_, 173_, 373_, 374_)
9. WEEKEND Weekend (178_, 173_, 373_, 374_)
10. PALIO WEEKEND / WEEKEND Weekend (178_, 173_, 373_, 374_)
11. PALIO WEEKEND Weekend (178_, 173_, 373_, 374_)
12. MULTIPLA (186_)
13. DEDRA (835_)
14. LYBRA (839_)
15. LYBRA SW (839_)
16. DEDRA SW (835_)
17. SIENA (178_, 172_)
18. ALBEA (178_, 172_)
19. PETRA (178_, 172_)
20. PALIO / ALBEA Saloon (178_, 172_)
21. See more in applications

The principles of the timing belt tensioner work

Excessive tension leads to intensive wear of the timing parts - pulley bearings (water pump, generator, tensioner, etc.), the belt itself, and others. In addition, a tight belt stretches faster and shortens its service life. Too little preload is fraught with more serious problems - slipping of the belt along the toothed pulleys of the camshafts, which leads to a violation of the valve timing and deterioration of the entire engine.

Therefore, a tensioning device is introduced into the timing drive in the form of rollers of one design or another, which, during engine operation, maintain an optimal belt tension.